Tel Aviv - Israeli security forces fired rubber bullets, tear gas and stun grenades to break up groups of Palestinian stone-throwers on Friday as annual Land Day rallies turned violent. Medics in the Gaza Strip said the Israelis also used live fire to prevent protesters from nearing the frontier wall, seriously wounding one man. Palestinian activists have called for a "Global March to Jerusalem" to mark the day when Israeli Arabs protest against government policies that they say has stripped them of land. Israeli forces were put on high alert at frontier crossings with Lebanon and Syria, but there were no reports of anyone nearing the border fences, unlike last year when several demonstrators were killed in separate protests. However, violence flared at checkpoints in the occupied West Bank to the north and south of occupied Jerusalem. Witnesses also reported disturbances at gates leading into the Old City, with police limiting access to the Muslims' revered al-Aqsa Mosque.